![]() The messages are encrypted and authenticated to ensure that they can not be simulated by external computer equipment. This two way messaging ensures that the equipment cannot be substituted. On receipt of this message the BT Redcare equipment will transmit back a response. A second high frequency polling signal is sent from the exchange to the BT Redcare equipment. Line cuts can thus be detected and the ARC alerted. If the line is cut the low frequency signal will not be received at the exchange. ![]() An additional benefit of BT Redcare is that it can be connected to an existing speech telephone line, thus reducing the cost of monitoring.Ī low frequency signal is transmitted by the BT Redcare equipment within the alarm control panel down a conventional telephone line to the local BT exchange. DigiPlus® will operate on both the old and new networks, providing the Installer with peace of mind that if the exchange is upgraded, the Alarm system will still signal through to Southern or Northern Monitoring's ARCs.īT Redcare is an alarm monitoring system that will signal upon activation or when the telephone line has been cut. ![]() DigiPlus® is guaranteed to make all existing digital communicators fully compatible with BT's 21CN. Failure to do so may leave existing signalling devices that rely on copper telephone lines, such as digital communicators susceptible to malfunction with the added cost caused by additional phone line charging from non-freefone numbers.ĭigiPlus® is a small device that was developed in conjunction with Vodafone that fits between any existing digital communicator and the telephone line providing an improved and robust signalling solution. ![]() Since the announcement that the 21CN roll-out will happen on a more spontaneous basis, Installers should be alert for Telephone exchange upgrades in their region. This strategy was recently changed to focus on upgrading exchanges as and when the new technology is required or the legacy equipment within the exchange has reached the end of its economic life. 21CN was scheduled to upgrade the whole UK PSTN network over the next five years. DigiPlus® has been developed as a solution to the uncertainty surrounding BT's Next Generation Network (NGN), the 21st Century Network (21CN). ![]()
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